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Change method: 1. Use the "document.getElementsByTagName("title")[0].innerText="value that needs to be set";" statement to modify; 2. Use "document.title="Need to set The value of ";" statement to modify.
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
javascript to change the title title
1. innerText method
through console. log(document.getElementsByTagName("title")[0]), I found that the b2386ffb911b14667cb8f0f91ea547a7 label can be printed. There are only text nodes in the label, so I guess it can only recognize TextNode, so I used innerText to set the value of title, and it succeeded. .
document.getElementsByTagName("title")[0].innerText = '需要设置的值';
2. document.title method
After testing, the value of title can also be set through document.title.
console.log(document.title); # 可以获取title的值。 document.title = '需要设置的值'; # 设置title的值。
Example
window.onfocus = function () { document.title = '恢复正常了...'; }; window.onblur = function () { document.title = '快回来~页面崩溃了'; };
We change the value of title when the browser gains focus and loses focus. You can find that the title changes when switching browser tabs.
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